关键词: 废弃填料, 异位发酵床, 有机肥料, 安全性评价

Abstract: In order to study the resource utilization of waste fillers from swine industry, this study carried out a safety evaluation for waste fillers of the ectopic microbial fermentation bed. Contents of nutrient and heavy metal, seed germination rate index, death rate of Ascaris eggs and fecal coliform group counts of 2 kinds waste fillers were analyzed. Results showed that the total nutrient contents were 6.19% and 7.21%, respectively; the mass fraction of organic matters were 56.11% and 48.63%, respectively; the pH were 8.00 and 8.50, respectively; and heavy metals contents were relatively low, which were in accordance with the related standards of GB 8172-1987 and NY 525-2012. The seed germination  rate  indexes of these 2 waste fillers were 127.67% and 118.77%, respectively, indicating 2 waste fillers had no toxicity to crops. The death rates of Ascaris eggs were 95.75% and 95.60%, respectively; and the fecal coliform group counts were 76 and 83, respectively, which were in accordance with the relevant standards of organic fertilizer in China. These results indicated that Ectopic microbial fermentation bed system is a non-polluting, zero-emission organic farming technique, in which the organic matter was degraded and utilized by microorganisms at the same time.

Key words: waste filler, ectopic microbial fermentation bed, organic fertilizer, safety evaluation